US2161300A - Chuck - Google Patents

Description

CHUCK Filed not. 8, 1956 Parenteel .lime e, 1939 v 'UNITED' STATES PATENT ori-lcs cnuc'x welding :enen nemen, mae reen, use. Appueeuea oetebef a, im, serial Ne. 104,599 4 claim. `(ci. lm4n-sz) This. invention relates to a tool holding chuck for use with .the rotatable spindle of a drill press or like machine. f

The invention has for its object to provide a 5 simple, eiilcient and inexpensive device or chuck Vin'which a tool holder may be frictionaily coupled with a rotatable driving member to be rotated therewith under one condition of use, and to be released therefrom under another condition of 1o use, as will be described.

The invention also has for its object to provide y arresting rotation of the tool holder andV enable the tool. to be manually engaged with the work without interfering with the rotationof the driving member.

The invention further has for its object to enable the tool holder to be automaticallyengaged 3 with the work while the tool holder is being rotated by means of the hollow handle, as will be .described These and other features of this invention will be pointed out in the claims at the end of this 3;, speciilcation.

In the accompanying drawing, Fig. 1 is an elevation of a chuck embodying this invention, with the tool shown as 'a screw driver; Fig. 2 is a vertical longitudinal section of the chuck and tool 40 shown in Fig. l with the parts in their normal positionyFlg. 3 a detail in vertical section of the driving clutch member; Fig. 4 a detail in section of the tool holder, the tool detachably secured thereto, the driven clutch memberv affixed tothe tool holder, and a spring for normally member carried by said hollow handle.

' In accordance-with this invention, the chuck isv provided with a driving member which is secured to the Arotary spindle of a drill pressl or other` machine, and a driven member to which 56 a tool may and preferably will be detachably -secured to enable different tools to be usedwith the chuck. In the present instance, the tool is shown as a screw driver I0, which is detachably secur'ed to they driven member or tool holder. The tool holder herein shown comprises a cylinder I2 closed at its bottom by a head I3 from which extends a hollow boss I4 into which the screw driver Il is inserted and detachably secured therein to rotate with the cylinder I2 and yto be readily removed therefrom when a diiferent tool is-to be used.

The cylinder I2 has secured to it a clutch member I5, herein shown as the male member of the clutch, which male member is shown as pro.- vided with acylindrical lower Kportion I Sand a conical upper -portion I1. The clutch member I5 may and preferably will be made of leather,

libre or like material and is firmly secured to the tool holder by a pin I8 extended through the cylinder I2 and the cylindrical lower portion I6 of the clutch member I5.

4The male clutch member I5 extends into a conical recess or chamber 2l4 in a female clutch member l2|, preferably made of steel or other metalv and of cylindrical exterior and provided at n its upper end withA a cylindrical extension 22,

v which'is centrally located and of smaller diameter than the female member 2| to provide the latter with an annular shoulder 23, upon which the male clutch member Il is normally supported. with the male clutch member separated from the female member after the m'ann'er'represented in4 Fig. 2. The extension 22 has afilxed thereto a shank or stem 25, which is designed to be secured to the rotatable spindle, not shown, of a drill press or other machine of. known construction and commonly used in machine shops.

'111e male clutch member I5 may be suspended from the female clutch member 2I by a cylinder 21 preferably of metal and which is open at -itslower end and of such internal diameter as will make afdri'ving t with the cylindrical portion -I2 of the tool holder, after manner represented in Fig. 2, soas to enable the tool holder to l rotate with the cylinder 21 with the clutch members Il, 2I in their-disengaged condition, shown in Fig.lv 2. The tool holder I2 is engaged. with the cylinder 21 by sumcient friction to enable the tool holder to be. rotated with the cylinder 21, but also to enable rotation of the tooll holder to be stopped or arrested by the operator grasping the cylinder 21 and lholding it from rotating ywith the driving clutchI member 2I with the clutch members Il and 2i in their disengaged position represented in Fig. `2, or the cylinder 21 may bey vand turn the screw driveror other tool and engage it with the work or to so position the tool .withrelationto the work that it-will automatically be engaged therewith, when theoperator releases the handle or cylinder 21.

Provision is also made for rotating the tool holder and its handle with'the spindle and the driving clutch member, when the clutch members I5, 2| arein their normal or separated condition, shown in Fig. 2. To this end, the hollow 4lip 33 with which cooperates aA beveled' edge handle 21 is provided at its upper end with a head 30, having a central opening 3| through` which the extension 22 of the driving member 2| is extended,fand which extension is frictionally engaged with a leather or like washer or bushing 32 carried by thehollowhandle and interposed between the head 30 of the handle and the shoulder 23 on the driving clutch member 2| as shown in Fig. 2. The washer or bushing 32 may and preferably will have on its under side a beveled 34 on the driving clutch member 2|.

By reference to Fig. 2 it will be seen that the washer or bushing forms an auxiliary frictional clutch member, which couples ther tool holder with the driving clutch member 2| and the spindle to which the shank 25 is secured, so that in the normal or separated position of the main clutch I members I5, 2| the tool holder |2 may be rotated with the spindle independently of the main clutch members, which Aenables the tool holder to be rotated with the spindle as the'tool holder is being advanced or moved toward the work..

It will be observed that the cylinder 21 has a double function, in that it constitutes a handle for the tool holder and also'as a housing forthe auxiliary clutch 4member32. The members l5, 2|

of the main clutch are normally separated by a male clutch member |5 and bears against an antifriction button 36 having a rounded head which engages the rounded bottom wall of the recess 31, and has astem 39 which extends into contact of the female member with the male member and thus enable the screw driver or other tool. to be rotated or turned gently when first brought intoV contact with the head of the screwor other work, until the tool is properly positioned with relation to the work and into position to enable the screw driver to be forced by-the spring 36 into the slot in the head of a screw, or in the case of a. socket wrenchY to engageA the head of a bolt on its sides, and thus have the tool firmly and properly engaged with the work to effect the desired rotation thereof until the work has been turned into its final or desired position. When the screw, bolt or other work hasbeen turned into its nal position, the resistance offered by awww v'the work to further turning is such as to over? come the frictional engagementofthe main clutch members I5, 2|, and'thereby causle" driving clutch member 2| to slip on the driven clutch'vmember I5. When this occurs, the oper'- ator removesthe downward pressure upon the spindle and shank |5, which permits the spring 36 to disengage the driving clutch member 2| from the driven clutch member |5 and bring thef driving clutch member into engagement with the auxiliary clutch member 32 carried by the handle 21 of the tool holder, after which the chuck may belifted as a unit, and a -new piece of work posi- 4tioned for a second operation. A 'I'he tool I0 may and preferably will be detacherate with a projection on the inner side of the hollow boss Il. The projection may be con-` veniently provided by a pin l1, which is driven into a hole formed transversely of thehollow boss and arranged so as to cut the inner wall of the hollow boss and allow a portion of the pin to project into the hollow boss, wherein it cooperates with horizontal wall 'on the shank of the tool boss, and thereby practically key the tool to the' tool holder, without interfering with the ready removal of the toolt Y ,From the above description, `it will be observed that the driving clutch member, which in the present instance is the female member 2| of the main clutch, cooperates with the auxiliary clutch member 32 to rotate the tool holder as the latter is advanced toward the work, until the tool carried 'by the tool holder meets the work, whereupon the tool holder continues to be rotated and the tool is aligned with the work, whereupon the tool is forced by the spring 36 into proper engagement with the work to rotate or turn the same, which is effected by engagement of the driving clutch member 2| with the driven clutch member |5, which occur/s at or about the time the tool is 'properly engagedv with the work. The work is then turned or rotated by the members 2| and I5 of the main clutch, until the screw. or other work has been brought into its operative position, whereupon the tool, its holder and the driven clutch member |5 become stationary, and the driving clutch member 2| slipsI upon the driven member I5 and allows the driving clutch member 2| and the spindle tol which it is secured, to continue rotating without rotating the screw or other work, thereby avoiding injury tothe work.

The extension 22 of the driving clutch memberis made long enough to enable it to remainV s driven member |5 of the main clutch to effect rotation of theltool holder and its tool.

One embodiment of the invention is herein' shownbutitisnot desiredtolimittheinvention to the particular embodiment shown.

Havina thus described the invention. what is claimed is:

5 1. A chuck having. in combination, a rotatabledriving member, a tool holder,l and an in' terposed clutch composed of a female memberV aiiixed to said rotatable driving member. a male memberamxed to said tool holder and friction-l 10' ally ensaaed with said iemale member. and a hollow handle for -said tool holder provided with an auxiliary trictional clutch member suspended from said female member-and rotatable therewith under one condition oi use and also ndeholder and cooperating with" said driving clutch membertoenalavietlielattertorotatethetoolv holder independently oi the driven clutch mem- 25 ber aiiix'ed-to said tool holder.

ii. A chuck havina'. in holder provided with a cylindrical uwer tion and a hollow bols. a

f 'immer combination. 'a :tool v D011'- clutoh member harina` a vcylindrical portion secured to the cylindrical portion of the'toolholderandhavinaaeonical upper portion extended from said cylindrical portiomatooldetachablysecuredinsaidhollow bosrand a drivina clutch member having g a conical recess into whichv the conical portion otthedrivenclutchmemberisextendedtotate said tool-holder in one position 'oioperatl 'said drivina chitch member also heinz4 provided with a'nouter drivlna surface, an auxiliary clutch member comprisinsvan annular member aiiixed to said tool holder and adapted to-enaa`le said outer drivins surface to rotate said tool holder when the parte arein a secondposition o! operation.

" 4. A chuck havina. in combination, a driving and a driven clutch member, a tool holder ailixed to the driven clutch member to rotate therewith asaunit.aholiowhandleaiiixedtosai dtool to rotatetherewith, andan auxiliary n the hollow' handle 1 romeu by the drinne' clutch manner mdepena-

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